blastosphere vs trophoblast

blastosphere and trophoblast both are nouns.

Word	Noun	Adjective	Verb	Adverb
blastosphere	Yes	No	No	No
trophoblast	Yes	No	No	No

blastosphere (noun)	trophoblast (noun)
early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs	the membrane that forms the wall of the blastocyst in early development; aids implantation in the uterine wall